viberation On the lower end of the scale is a shimmy or pounding of something that is turning or spinning, out of balance,or out of round,,shaking the steering wheel and or dashboard with a frequincy that varies with speed. Sometimes improper tire balancing will allow a tire to spin smoothly at speeds up to 60 mph then start shaking as speed increases and then smooth out at 68 to75 mph , your tires may need to be balaced
dynamicly or trued. many of the tires we are sold nowadays are imports from china,,
even when they have domestic names, and are manufactured to lower standards.
than American or european brands. Elbow